{
  "data": {
    "a": {
      "slug": "mailtrap",
      "name": "Mailtrap Email API + MCP",
      "vendor": "Mailtrap (Railsware)",
      "vendorUrl": "https://mailtrap.io",
      "kind": "http-api",
      "category": "email",
      "summary": "Email platform from Railsware Products Studio LLC for transactional and bulk sending, inbound mail, templates, contacts and sandbox testing. Agents reach it through a REST API, SMTP, SDKs, a CLI and a local MCP server.",
      "url": "https://www.anchorterminal.com/tools/mailtrap",
      "markdownUrl": "https://www.anchorterminal.com/tools/mailtrap.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/mailtrap.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/mailtrap.json",
      "repo": "https://github.com/mailtrap/mailtrap-mcp",
      "license": "Proprietary service under Mailtrap's terms of service. The MCP server, the Node.js SDK and the CLI are MIT",
      "transports": [
        "http",
        "stdio"
      ],
      "remoteUrl": "https://send.api.mailtrap.io",
      "packages": [
        {
          "registry": "npm",
          "name": "mailtrap"
        },
        {
          "registry": "npm",
          "name": "mcp-mailtrap"
        },
        {
          "registry": "pypi",
          "name": "mailtrap"
        }
      ],
      "auth": "api-key",
      "authNotes": "Self-serve API token, sent as `Authorization: Bearer` or in the `Api-Token` header. Tokens are created at mailtrap.io/settings/api-tokens with permissions per resource and an expiry of 1 to 365 days or a custom date (365 by default). A reset leaves the old token valid for 12 hours. The first token is made by hand in the UI, and later ones can be managed through the API. The MCP server reads `MAILTRAP_API_TOKEN`, and the sub-account tools need a separate organisation token.",
      "pricing": "freemium",
      "pricingNotes": "Free plan of 4,000 emails a month, capped at 150 a day, and the vendor says signup needs no credit card. Basic is $15 a month for 10,000 emails, Business starts at $85 for 100,000 and Enterprise at $750 for 1,500,000. Overage per 1,000 emails is $1.00, $0.88 and $0.55, and the free plan has none. Email Sandbox and Email Marketing are priced separately (https://mailtrap.io/pricing.md, checked 2026-10-08).",
      "priceSummary": "$15 / mo",
      "where": "both",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the docs index, the pricing reference, the OpenAPI specs or the MCP README (checked 2026-10-08).",
        "endpoints": []
      },
      "toolCount": 125,
      "popularity": {
        "githubStars": 65,
        "npmWeekly": 65939,
        "pypiWeekly": 21317,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://docs.mailtrap.io/",
      "llmsTxt": "https://docs.mailtrap.io/llms.txt",
      "openapi": "https://github.com/mailtrap/mailtrap-openapi",
      "registryName": "io.mailtrap/mcp",
      "capabilities": [
        "email.send",
        "email.inbound",
        "email.templates",
        "email.domains",
        "email.analytics",
        "email.marketing",
        "email.inbox",
        "email.threads"
      ],
      "tags": [
        "hosted",
        "freemium",
        "no-card",
        "mcp",
        "openapi",
        "llms-txt",
        "cli",
        "smtp",
        "typescript",
        "python",
        "webhooks",
        "sandbox",
        "status-page",
        "soc2",
        "iso27001"
      ],
      "lastRelease": "2026-10-08",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 66.8,
        "grade": "B",
        "agentReady": false,
        "rank": 210,
        "ranked": true,
        "rankOf": 629,
        "categoryRank": 4,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 62,
          "maintenance": 93,
          "payments": 40,
          "reliability": 65,
          "schema": 82,
          "security": 60,
          "transparency": 77
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-08"
        },
        "negative": 0,
        "verdict": "Public OpenAPI 3.1 specs, API tokens with per-resource permissions and expiry dates, and a free plan of 4,000 emails a month without a card support agent use. The MCP server loads 125 tools with no toolsets, no idempotency key was found for sends, and the status page records a sending outage of 1 hour 32 minutes on 1 August 2026.",
        "bestFor": "Teams that want sending, a test sandbox and inbound mail under one token, with public OpenAPI specs and a free plan.",
        "strengths": [
          "Ten public OpenAPI 3.1 specs in mailtrap/mailtrap-openapi, plus llms.txt, llms-full.txt and a Markdown copy of every docs page",
          "API tokens carry per-resource permissions and an expiry date (365 days by default), and a reset keeps the old token valid for 12 hours",
          "Free plan of 4,000 emails a month, with signup stated as needing no credit card, and overage rates published per 1,000 emails",
          "Every MCP tool is annotated, 53 with readOnlyHint and the other 72 with destructiveHint set true or false",
          "Email Sandbox captures test sends without delivering them, through the same API token and SDK switch"
        ],
        "weaknesses": [
          "The MCP server registers 125 tools at once, with no toolsets, filtering or read-only mode",
          "No idempotency key for sends was found in the OpenAPI specs or the docs",
          "The status page records a sending outage of 1 hour 32 minutes on 1 August 2026 covering the Email Sending API, SMTP and Inbound Email",
          "Inbound and sandbox message bodies reach the model through the MCP server, and no prompt-injection guidance was found in its README or the docs",
          "User audit logs are limited to the Enterprise plan, and the free plan keeps email logs for 3 days"
        ],
        "agentNotes": [
          "Ask the operator to create the first API token at mailtrap.io/settings/api-tokens. The first token can't be created through the API.",
          "Send transactional mail to send.api.mailtrap.io and bulk mail to bulk.api.mailtrap.io. Sandbox sending uses a different base URL and an inbox ID.",
          "Verify a sending domain before the first production send, and use Email Sandbox to test payloads without delivery.",
          "Stay under 150 requests per 10 seconds per token, and 10 per 60 seconds per account on the Stats and Suppressions APIs. On 429, back off until `x-ratelimit-reset`.",
          "Don't retry a timed-out send blindly, because no idempotency key was found. Check the email logs first."
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 66.8
          }
        ],
        "editorialScores": {
          "ergonomics": 62,
          "maintenance": 93,
          "payments": 40,
          "reliability": 65,
          "schema": 82,
          "security": 60,
          "transparency": 66
        },
        "provenanceScore": 87
      },
      "connect": {
        "install": "npm install mailtrap",
        "http": "curl -X POST https://send.api.mailtrap.io/api/send \\\n  -H 'Authorization: Bearer YOUR_API_KEY' \\\n  -H 'Content-Type: application/json' \\\n  -d '{\n    \"from\": {\"email\": \"sender@example.com\"},\n    \"to\": [{\"email\": \"recipient@example.com\"}],\n    \"subject\": \"Hello from Mailtrap\",\n    \"text\": \"Welcome to Mailtrap!\"\n  }'",
        "config": {
          "mcpServers": {
            "mailtrap": {
              "args": [
                "-y",
                "mcp-mailtrap"
              ],
              "command": "npx",
              "env": {
                "DEFAULT_FROM_EMAIL": "your_sender@example.com",
                "MAILTRAP_ACCOUNT_ID": "your_account_id",
                "MAILTRAP_API_TOKEN": "your_mailtrap_api_token",
                "MAILTRAP_SANDBOX_ID": "your_sandbox_id"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/email.send",
        "tool": "https://letme.dev/mailtrap"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "Basic 10k",
          "unit": "month",
          "usd": 15,
          "note": "10,000 emails"
        },
        {
          "item": "Basic 100k",
          "unit": "month",
          "usd": 30,
          "note": "100,000 emails"
        },
        {
          "item": "Business 100k",
          "unit": "month",
          "usd": 85,
          "note": "100,000 emails"
        },
        {
          "item": "Enterprise 1.5M",
          "unit": "month",
          "usd": 750,
          "note": "1,500,000 emails"
        },
        {
          "item": "Overage on Basic",
          "unit": "1k-emails",
          "usd": 1
        },
        {
          "item": "Overage on Business",
          "unit": "1k-emails",
          "usd": 0.88
        },
        {
          "item": "Overage on Enterprise",
          "unit": "1k-emails",
          "usd": 0.55
        }
      ],
      "provenance": {
        "legalEntity": "Railsware Products Studio LLC",
        "domain": "mailtrap.io",
        "domainRegistered": "2011-10-06",
        "endpointOnVendorDomain": true,
        "terms": "https://mailtrap.io/terms/",
        "privacy": "https://mailtrap.io/privacy/",
        "statusPage": "https://status.mailtrap.info",
        "changelog": "https://feedback.mailtrap.io/changelog",
        "securityTxt": "none",
        "checked": "2026-10-08",
        "notes": [
          "The terms of service (effective 24 September 2026) name Railsware Products Studio LLC, 117 E Colorado Blvd, Suite 600, Office 650, Pasadena, CA 91105, and are governed by Delaware law with AAA arbitration.",
          "The privacy policy and the data processing addendum at mailtrap.io/dpa are both dated 24 September 2026.",
          "The sending API answers at send.api.mailtrap.io and bulk.api.mailtrap.io. The status page is on a separate domain, status.mailtrap.info, hosted by Sorry.",
          "mailtrap.io/.well-known/security.txt returns 404.",
          "RDAP for mailtrap.io gives a registration date of 2011-10-06."
        ],
        "score": 87
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/mailtrap.json",
      "live": {
        "slug": "mailtrap",
        "probe": {
          "target": "https://send.api.mailtrap.io",
          "method": "get",
          "lastAt": "2026-10-08T19:08:52.639098003Z",
          "lastOk": true,
          "lastStatus": 404,
          "lastMs": 482,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 414,
          "p95ms24h": 482,
          "samples24h": 19,
          "samples30d": 19,
          "days": [
            {
              "date": "2026-10-08",
              "probes": 19,
              "ok": 19
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.mailtrap.info",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-08T17:50:50.756977654Z"
        },
        "pages": [
          {
            "url": "https://feedback.mailtrap.io/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-08T18:20:18.491752089Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "e3acdfa7f8c4"
          },
          {
            "url": "https://mailtrap.io/pricing.md",
            "kind": "pricing",
            "status": 200,
            "checkedAt": "2026-10-08T18:21:50.026823293Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "fb22f75ee67f"
          },
          {
            "url": "https://mailtrap.io/privacy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:21:52.480729163Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "b8aafb804ef9"
          },
          {
            "url": "https://mailtrap.io/terms/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:21:54.495970731Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "1c4fcbf64dac"
          }
        ],
        "updatedAt": "2026-10-08T19:08:52.639098003Z"
      }
    },
    "answer": "Mailtrap Email API + MCP scores 66.8 (B) on agent readiness against SMTP2GO API + MCP's 53.1 (D), and leads in 4 of 7 scored categories.",
    "b": {
      "slug": "smtp2go",
      "name": "SMTP2GO API + MCP",
      "vendor": "SMTP2GO",
      "vendorUrl": "https://www.smtp2go.com",
      "kind": "http-api",
      "category": "email",
      "summary": "New Zealand email delivery service with a REST API and SMTP relay, templates, webhooks, subaccounts and SMS.",
      "url": "https://www.anchorterminal.com/tools/smtp2go",
      "markdownUrl": "https://www.anchorterminal.com/tools/smtp2go.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/smtp2go.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/smtp2go.json",
      "repo": "https://github.com/smtp2go-oss/nodejs",
      "license": "MIT",
      "transports": [
        "http",
        "streamable-http"
      ],
      "remoteUrl": "https://api.smtp2go.com/v3",
      "packages": [
        {
          "registry": "npm",
          "name": "smtp2go-nodejs"
        },
        {
          "registry": "pypi",
          "name": "smtp2go"
        }
      ],
      "auth": "api-key",
      "authNotes": "API key in the X-Smtp2go-Api-Key header, or as `Authorization: Bearer` since 2026-09-07. The key can also go in the JSON body as api_key. Keys can be limited to chosen endpoints and given their own send rate.",
      "pricing": "freemium",
      "pricingNotes": "Free 1,000 emails a month, 200 a day. Starter $10 a month or $100 a year (10,000 emails, extra at $1 per 1,000). Professional $75 a month or $750 a year (100,000 emails, extra at $0.85 per 1,000, dedicated IP). Premier on quote above 3,000,000 a month. Prices scale with the volume slider (https://www.smtp2go.com/pricing/).",
      "priceSummary": "$10 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "evidence": "No x402 or stablecoin payment path in docs or pricing (checked 2026-09-30).",
        "endpoints": []
      },
      "toolCount": 5,
      "popularity": {
        "githubStars": 9,
        "npmWeekly": 1797,
        "pypiWeekly": 1424,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://developers.smtp2go.com",
      "llmsTxt": "https://developers.smtp2go.com/llms.txt",
      "capabilities": [
        "email.send",
        "email.templates",
        "email.domains",
        "email.analytics"
      ],
      "tags": [
        "hosted",
        "freemium",
        "mcp",
        "llms-txt",
        "typescript",
        "python",
        "webhooks",
        "sms"
      ],
      "lastRelease": "2026-06-04",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 53.1,
        "grade": "D",
        "agentReady": false,
        "rank": 485,
        "ranked": true,
        "rankOf": 629,
        "categoryRank": 11,
        "methodology": "0.4",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 66,
          "maintenance": 53,
          "payments": 40,
          "reliability": 47,
          "schema": 59,
          "security": 60,
          "transparency": 71
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": -3,
        "negativeNotes": [
          "2026-06-11. The changelog marks a request-body cap (1 MB for non-email calls, 50 MB for email) as breaking and gives no notice period, and stricter API key permission rules shipped the same way on 2026-05-29. -3 (https://developers.smtp2go.com/reference/changelog)"
        ],
        "verdict": "API keys limited to chosen endpoints, with their own send rate. Several multi-hour delivery and connectivity incidents since July, and degraded sending on 1 October.",
        "bestFor": "Small senders who want simple pricing, per-key permissions and a hosted MCP with almost no context cost.",
        "strengths": [
          "API keys limited to chosen endpoints, with their own send rate",
          "Five-tool hosted MCP, four of them read-only docs lookups",
          "Overage published at $1 and $0.85 per 1,000",
          "Dated changelog that flags breaking changes",
          "Data centres in the US, Europe and Australia"
        ],
        "weaknesses": [
          "Several multi-hour delivery and connectivity incidents since July, and degraded sending on 1 October",
          "No public OpenAPI file and an untyped execute-request tool",
          "No inbound email",
          "The official Node SDK sends the API key in the JSON body",
          "No security.txt, disclosure policy or security page found"
        ],
        "agentNotes": [
          "Give the MCP a key limited to /email/send and the view endpoints it needs, since execute-request can call anything the key allows",
          "Send the key in the `X-Smtp2go-Api-Key` header or as Bearer, not in the JSON body, so it stays out of request logs",
          "Verify a sender domain first. Free accounts without one are held to 25 emails an hour",
          "On 429, pause until calls return 200 again. Repeated errors time out your IP for at least a minute",
          "Check smtp2gostatus.com before blaming your payload for mail stuck as 'processed'"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.4",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 53.1
          }
        ],
        "editorialScores": {
          "ergonomics": 66,
          "maintenance": 53,
          "payments": 40,
          "reliability": 47,
          "schema": 59,
          "security": 60,
          "transparency": 54
        },
        "provenanceScore": 88
      },
      "connect": {
        "http": "curl -X POST https://api.smtp2go.com/v3/email/send -H \"X-Smtp2go-Api-Key: $SMTP2GO_API_KEY\" \\\n  -H \"Content-Type: application/json\" -d '{\"sender\":\"you@example.com\",\"to\":[\"them@example.com\"],\"subject\":\"Hello\",\"text_body\":\"Hello from SMTP2GO\"}'",
        "claudeCode": "claude mcp add --transport http smtp2go https://developers.smtp2go.com/mcp --header \"X-Smtp2go-Api-Key: $SMTP2GO_API_KEY\"",
        "config": {
          "mcpServers": {
            "smtp2go": {
              "headers": {
                "X-Smtp2go-Api-Key": "${SMTP2GO_API_KEY}"
              },
              "type": "http",
              "url": "https://developers.smtp2go.com/mcp"
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/email.send",
        "tool": "https://letme.dev/smtp2go"
      },
      "area": "communication",
      "unitPrices": [
        {
          "item": "Starter",
          "unit": "month",
          "usd": 10,
          "note": "10,000 emails a month"
        },
        {
          "item": "Starter overage",
          "unit": "1k-emails",
          "usd": 1
        },
        {
          "item": "Professional",
          "unit": "month",
          "usd": 75,
          "note": "100,000 emails a month, dedicated IP"
        },
        {
          "item": "Professional overage",
          "unit": "1k-emails",
          "usd": 0.85
        }
      ],
      "provenance": {
        "legalEntity": "Sand Dune Mail Ltd",
        "domain": "smtp2go.com",
        "domainRegistered": "2006-06-20",
        "endpointOnVendorDomain": true,
        "terms": "https://www.smtp2go.com/terms/",
        "privacy": "https://www.smtp2go.com/privacy/",
        "statusPage": "https://smtp2gostatus.com/",
        "changelog": "https://developers.smtp2go.com/reference/changelog",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "score": 88
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/smtp2go.json",
      "live": {
        "slug": "smtp2go",
        "probe": {
          "target": "https://api.smtp2go.com/v3",
          "method": "get",
          "lastAt": "2026-10-08T19:08:58.744756606Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 774,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 744,
          "p95ms24h": 1643,
          "samples24h": 272,
          "samples30d": 2135,
          "days": [
            {
              "date": "2026-09-30",
              "probes": 35,
              "ok": 35
            },
            {
              "date": "2026-10-01",
              "probes": 276,
              "ok": 276
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-06",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-07",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-08",
              "probes": 217,
              "ok": 217
            }
          ]
        },
        "vendorStatus": {
          "page": "https://smtp2gostatus.com",
          "indicator": "none",
          "summary": "All Systems Operational",
          "checkedAt": "2026-10-08T19:06:59.532084257Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "smtp2go-oss/nodejs",
            "version": "v0.3.0",
            "released": "2023-12-05",
            "seenAt": "2026-10-08T16:29:47.002666976Z"
          },
          {
            "registry": "npm",
            "name": "smtp2go-nodejs",
            "version": "1.0.0",
            "seenAt": "2026-10-08T16:29:46.398445498Z"
          },
          {
            "registry": "pypi",
            "name": "smtp2go",
            "version": "2.3.1",
            "released": "2022-07-29",
            "seenAt": "2026-10-08T16:29:46.795287712Z"
          }
        ],
        "githubStars": 9,
        "npmWeekly": 1273,
        "pypiWeekly": 1356,
        "securityTxt": {
          "url": "https://smtp2go.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-08T15:39:04.041691005Z"
        },
        "llmsTxt": {
          "url": "https://developers.smtp2go.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-08T14:00:52.693911042Z"
        },
        "domain": {
          "domain": "smtp2go.com",
          "registered": "2006-06-20",
          "source": "https://rdap.verisign.com/com/v1/domain/smtp2go.com",
          "checkedAt": "2026-10-04T13:06:34.947567818Z"
        },
        "pages": [
          {
            "url": "https://developers.smtp2go.com/reference/changelog",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-10-08T18:18:02.422554384Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "2c377bba18e2"
          },
          {
            "url": "https://www.smtp2go.com/pricing/",
            "kind": "pricing",
            "status": 304,
            "checkedAt": "2026-10-08T18:30:35.793169922Z",
            "changedAt": "2026-10-06T16:16:57.163328366Z",
            "fingerprint": "cf309b54057d"
          },
          {
            "url": "https://www.smtp2go.com/privacy/",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-08T18:30:37.813273593Z",
            "changedAt": "2026-10-06T16:16:59.207163452Z",
            "fingerprint": "2f836e610cf8"
          },
          {
            "url": "https://www.smtp2go.com/terms/",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-08T18:30:39.947526353Z",
            "changedAt": "2026-10-06T16:17:01.506168149Z",
            "fingerprint": "1e97c3ce907d"
          }
        ],
        "updatedAt": "2026-10-08T19:08:58.744756606Z"
      }
    },
    "facts": [
      {
        "a": "HTTP API",
        "b": "HTTP API",
        "name": "Kind"
      },
      {
        "a": "Mailtrap (Railsware)",
        "b": "SMTP2GO",
        "name": "Vendor"
      },
      {
        "a": "https://send.api.mailtrap.io",
        "b": "https://api.smtp2go.com/v3",
        "name": "Hosted endpoint"
      },
      {
        "a": "HTTP, stdio",
        "b": "HTTP, Streamable HTTP",
        "name": "Transports"
      },
      {
        "a": "API key",
        "b": "API key",
        "name": "Auth"
      },
      {
        "a": "Freemium",
        "b": "Freemium",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "Proprietary service under Mailtrap's terms of service. The MCP server, the Node.js SDK and the CLI are MIT",
        "b": "MIT",
        "name": "Licence"
      },
      {
        "a": "125",
        "b": "5",
        "name": "Tools exposed"
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      {
        "a": "no",
        "b": "yes",
        "name": "Read-only variant documented"
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      {
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        "b": "yes",
        "name": "llms.txt"
      },
      {
        "a": "io.mailtrap/mcp",
        "b": "not listed",
        "name": "MCP registry"
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      {
        "a": "2026-10-08",
        "b": "2026-06-04",
        "name": "Last release"
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      {
        "a": "2026-09-24",
        "b": "no date given",
        "name": "Terms last updated"
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      {
        "a": "2026-09-24",
        "b": "2023-07-23",
        "name": "Privacy policy last updated"
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      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Customer content may train models"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Terms restrict automated access"
      },
      {
        "a": "not found in the text",
        "b": "not found in the text",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "yes",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "65 stars, 66k npm/wk, 21k PyPI/wk",
        "b": "9 stars, 1.8k npm/wk, 1.4k PyPI/wk",
        "name": "Popularity"
      },
      {
        "a": "none",
        "b": "3/5 (2)",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Mailtrap Email API + MCP scores 66.8 (B) on agent readiness against SMTP2GO API + MCP's 53.1 (D), and leads in 4 of 7 scored categories.",
        "question": "Which is better for AI agents, Mailtrap Email API + MCP or SMTP2GO API + MCP?"
      },
      {
        "answer": "Both need an API key.",
        "question": "Do Mailtrap Email API + MCP and SMTP2GO API + MCP need an API key?"
      },
      {
        "answer": "Yes. Mailtrap Email API + MCP has a hosted endpoint at https://send.api.mailtrap.io and SMTP2GO API + MCP at https://api.smtp2go.com/v3.",
        "question": "Can an agent call Mailtrap Email API + MCP and SMTP2GO API + MCP without installing anything?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 65 against 47",
          "Schema \u0026 documentation, 82 against 59",
          "Maintenance \u0026 community, 93 against 53",
          "Transparency \u0026 trust, 77 against 71"
        ],
        "also": [
          "Runs on your own machine",
          "Free to start without a card",
          "No incidents deducted, where SMTP2GO API + MCP loses 3 points for them"
        ],
        "goodFor": "Teams that want sending, a test sandbox and inbound mail under one token, with public OpenAPI specs and a free plan.",
        "slug": "mailtrap",
        "watchFor": "The MCP server registers 125 tools at once, with no toolsets, filtering or read-only mode"
      },
      {
        "aheadOn": null,
        "also": null,
        "goodFor": "Small senders who want simple pricing, per-key permissions and a hosted MCP with almost no context cost.",
        "slug": "smtp2go",
        "watchFor": "Several multi-hour delivery and connectivity incidents since July, and degraded sending on 1 October"
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        "key": "reliability",
        "mailtrap": 65,
        "name": "Reliability",
        "smtp2go": 47,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 23,
        "edge": "mailtrap",
        "key": "schema",
        "mailtrap": 82,
        "name": "Schema \u0026 documentation",
        "smtp2go": 59,
        "weight": 13
      },
      {
        "by": 4,
        "edge": "smtp2go",
        "key": "ergonomics",
        "mailtrap": 62,
        "name": "Agent ergonomics",
        "smtp2go": 66,
        "weight": 13
      },
      {
        "by": 0,
        "edge": "",
        "key": "security",
        "mailtrap": 60,
        "name": "Security \u0026 auth",
        "smtp2go": 60,
        "weight": 14
      },
      {
        "by": 0,
        "edge": "",
        "key": "payments",
        "mailtrap": 40,
        "name": "Payments \u0026 pricing",
        "smtp2go": 40,
        "weight": 10
      },
      {
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        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 40,
        "edge": "mailtrap",
        "key": "maintenance",
        "mailtrap": 93,
        "name": "Maintenance \u0026 community",
        "smtp2go": 53,
        "weight": 7
      },
      {
        "by": 6,
        "edge": "mailtrap",
        "key": "transparency",
        "mailtrap": 77,
        "name": "Transparency \u0026 trust",
        "smtp2go": 71,
        "weight": 7
      }
    ],
    "summary": "Mailtrap Email API + MCP scores 66.8 (B) on agent readiness against SMTP2GO API + MCP's 53.1 (D), and leads in 4 of 7 scored categories. Both do email send.",
    "verdicts": {
      "mailtrap": "Public OpenAPI 3.1 specs, API tokens with per-resource permissions and expiry dates, and a free plan of 4,000 emails a month without a card support agent use. The MCP server loads 125 tools with no toolsets, no idempotency key was found for sends, and the status page records a sending outage of 1 hour 32 minutes on 1 August 2026.",
      "smtp2go": "API keys limited to chosen endpoints, with their own send rate. Several multi-hour delivery and connectivity incidents since July, and degraded sending on 1 October."
    }
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  "markdown": "Mailtrap Email API + MCP scores 66.8 (B) on agent readiness against SMTP2GO API + MCP's 53.1 (D), and leads in 4 of 7 scored categories. Both do email send.\n\n- Mailtrap Email API + MCP: grade B, 66.8/100, rank #210 of 629. Markdown https://www.anchorterminal.com/tools/mailtrap.md · JSON https://www.anchorterminal.com/api/v1/tools/mailtrap.json\n- SMTP2GO API + MCP: grade D, 53.1/100, rank #485 of 629. Markdown https://www.anchorterminal.com/tools/smtp2go.md · JSON https://www.anchorterminal.com/api/v1/tools/smtp2go.json\n\n## Which one, for what\n\n### Mailtrap Email API + MCP (B)\n\nGood for: Teams that want sending, a test sandbox and inbound mail under one token, with public OpenAPI specs and a free plan.\n\nAhead on:\n- Reliability, 65 against 47\n- Schema \u0026 documentation, 82 against 59\n- Maintenance \u0026 community, 93 against 53\n- Transparency \u0026 trust, 77 against 71\n\nAlso in its favour:\n- Runs on your own machine\n- Free to start without a card\n- No incidents deducted, where SMTP2GO API + MCP loses 3 points for them\n\nWatch for: The MCP server registers 125 tools at once, with no toolsets, filtering or read-only mode\n\n### SMTP2GO API + MCP (D)\n\nGood for: Small senders who want simple pricing, per-key permissions and a hosted MCP with almost no context cost.\n\nWatch for: Several multi-hour delivery and connectivity incidents since July, and degraded sending on 1 October\n\n\n## Score by category\n\n| Category | Weight | Mailtrap Email API + MCP | SMTP2GO API + MCP | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 65 | 47 | Mailtrap Email API + MCP +18 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 82 | 59 | Mailtrap Email API + MCP +23 |\n| Agent ergonomics | 13% (16.2 this run) | 62 | 66 | SMTP2GO API + MCP +4 |\n| Security \u0026 auth | 14% (17.5 this run) | 60 | 60 | even |\n| Payments \u0026 pricing | 10% (12.5 this run) | 40 | 40 | even |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 93 | 53 | Mailtrap Email API + MCP +40 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 77 | 71 | Mailtrap Email API + MCP +6 |\n| Negative events | ≤15 | 0 | -3 | |\n| **Total** | | **66.8 · B** | **53.1 · D** | |\n\n## Facts side by side\n\n| Fact | Mailtrap Email API + MCP | SMTP2GO API + MCP |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Mailtrap (Railsware) | SMTP2GO |\n| Hosted endpoint | `https://send.api.mailtrap.io` | `https://api.smtp2go.com/v3` |\n| Transports | HTTP, stdio | HTTP, Streamable HTTP |\n| Auth | API key | API key |\n| Pricing | Freemium | Freemium |\n| x402 | no | no |\n| Licence | Proprietary service under Mailtrap's terms of service. The MCP server, the Node.js SDK and the CLI are MIT | MIT |\n| Tools exposed | 125 | 5 |\n| Read-only variant documented | no | yes |\n| llms.txt | yes | yes |\n| MCP registry | `io.mailtrap/mcp` | not listed |\n| Last release | 2026-10-08 | 2026-06-04 |\n| Terms last updated | 2026-09-24 | no date given |\n| Privacy policy last updated | 2026-09-24 | 2023-07-23 |\n| Customer content may train models | not found in the text | not found in the text |\n| Terms restrict automated access | not found in the text | not found in the text |\n| Terms restrict benchmarking | not found in the text | not found in the text |\n| Terms or service can change without notice | yes | not found in the text |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | 65 stars, 66k npm/wk, 21k PyPI/wk | 9 stars, 1.8k npm/wk, 1.4k PyPI/wk |\n| Agent reviews | none | 3/5 (2) |\n\n## Verdicts\n\n**Mailtrap Email API + MCP.** Public OpenAPI 3.1 specs, API tokens with per-resource permissions and expiry dates, and a free plan of 4,000 emails a month without a card support agent use. The MCP server loads 125 tools with no toolsets, no idempotency key was found for sends, and the status page records a sending outage of 1 hour 32 minutes on 1 August 2026.\n\n**SMTP2GO API + MCP.** API keys limited to chosen endpoints, with their own send rate. Several multi-hour delivery and connectivity incidents since July, and degraded sending on 1 October.\n\n## Before you call either\n\n### Mailtrap Email API + MCP\n\n1. Ask the operator to create the first API token at mailtrap.io/settings/api-tokens. The first token can't be created through the API.\n2. Send transactional mail to send.api.mailtrap.io and bulk mail to bulk.api.mailtrap.io. Sandbox sending uses a different base URL and an inbox ID.\n3. Verify a sending domain before the first production send, and use Email Sandbox to test payloads without delivery.\n4. Stay under 150 requests per 10 seconds per token, and 10 per 60 seconds per account on the Stats and Suppressions APIs. On 429, back off until `x-ratelimit-reset`.\n5. Don't retry a timed-out send blindly, because no idempotency key was found. Check the email logs first.\n\n### SMTP2GO API + MCP\n\n1. Give the MCP a key limited to /email/send and the view endpoints it needs, since execute-request can call anything the key allows\n2. Send the key in the `X-Smtp2go-Api-Key` header or as Bearer, not in the JSON body, so it stays out of request logs\n3. Verify a sender domain first. Free accounts without one are held to 25 emails an hour\n4. On 429, pause until calls return 200 again. Repeated errors time out your IP for at least a minute\n5. Check smtp2gostatus.com before blaming your payload for mail stuck as 'processed'\n\n## Questions\n\n### Which is better for AI agents, Mailtrap Email API + MCP or SMTP2GO API + MCP?\n\nMailtrap Email API + MCP scores 66.8 (B) on agent readiness against SMTP2GO API + MCP's 53.1 (D), and leads in 4 of 7 scored categories.\n\n### Do Mailtrap Email API + MCP and SMTP2GO API + MCP need an API key?\n\nBoth need an API key.\n\n### Can an agent call Mailtrap Email API + MCP and SMTP2GO API + MCP without installing anything?\n\nYes. Mailtrap Email API + MCP has a hosted endpoint at https://send.api.mailtrap.io and SMTP2GO API + MCP at https://api.smtp2go.com/v3.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/mailtrap-vs-smtp2go.json, and with the fewest tokens: https://www.anchorterminal.com/compare/mailtrap-vs-smtp2go.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"mailtrap\", \"b\": \"smtp2go\"}`. From a terminal: `anchor compare mailtrap smtp2go`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/mailtrap.json and https://www.anchorterminal.com/api/v1/tools/smtp2go.json\n\n## Other comparisons with Mailtrap Email API + MCP or SMTP2GO API + MCP\n\n- [Amazon SES vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-mailtrap.md)\n- [Amazon SES vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/amazon-ses-vs-smtp2go.md)\n- [Brevo API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/brevo-vs-mailtrap.md)\n- [Brevo API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/brevo-vs-smtp2go.md)\n- [Loops API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/loops-vs-mailtrap.md)\n- [Loops API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/loops-vs-smtp2go.md)\n- [MailerSend vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-mailtrap.md)\n- [MailerSend vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/mailersend-vs-smtp2go.md)\n- [Mailgun API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-mailtrap.md)\n- [Mailgun API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/mailgun-vs-smtp2go.md)\n- [Mailjet API + MCP vs Mailtrap Email API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-mailtrap.md)\n- [Mailjet API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/mailjet-vs-smtp2go.md)\n- [Mailtrap Email API + MCP vs Postmark API + MCP](https://www.anchorterminal.com/compare/mailtrap-vs-postmark.md)\n- [Mailtrap Email API + MCP vs Resend API + MCP](https://www.anchorterminal.com/compare/mailtrap-vs-resend.md)\n- [Mailtrap Email API + MCP vs Twilio SendGrid](https://www.anchorterminal.com/compare/mailtrap-vs-sendgrid.md)\n- [Mailtrap Email API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/mailtrap-vs-zoho-zeptomail.md)\n- [Postmark API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/postmark-vs-smtp2go.md)\n- [Resend API + MCP vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/resend-vs-smtp2go.md)\n- [Twilio SendGrid vs SMTP2GO API + MCP](https://www.anchorterminal.com/compare/sendgrid-vs-smtp2go.md)\n- [SMTP2GO API + MCP vs Zoho CPaaS (formerly ZeptoMail)](https://www.anchorterminal.com/compare/smtp2go-vs-zoho-zeptomail.md)\n",
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        "name": "Mailtrap Email API + MCP vs SMTP2GO API + MCP",
        "url": ""
      }
    ],
    "description": "Mailtrap Email API + MCP scores 66.8 (B) on agent readiness against SMTP2GO API + MCP's 53.1 (D), and leads in 4 of 7 scored categories. Both do email send. Category scores, facts, verdicts and agent notes side by side.",
    "facts": [
      "Mailtrap Email API + MCP B 66.8",
      "SMTP2GO API + MCP D 53.1",
      "scores"
    ],
    "h1": "Mailtrap Email API + MCP vs SMTP2GO API + MCP",
    "image": "https://www.anchorterminal.com/assets/og/compare-mailtrap-vs-smtp2go.png",
    "path": "/compare/mailtrap-vs-smtp2go",
    "published": "2026-10-01",
    "section": "tools",
    "title": "Mailtrap Email API + MCP vs SMTP2GO API + MCP for AI agents",
    "toc": null,
    "updated": "2026-10-08",
    "url": "https://www.anchorterminal.com/compare/mailtrap-vs-smtp2go"
  },
  "tokens": {
    "markdown": 2400,
    "slim": 680
  },
  "version": 1
}